What government policies the economy recovery from postwar recession

Here are some of the government policies that helped the economy recover from postwar recession:
1. supply-side economics - investing in capital
2. cooperative individualism - cooperate when needed, be individual otherwise
3. cutting the federal budget - don't spend too much money on unnecessary things

It can provide a social code to protect each citizen's future economical earnings. and then obviously defending the country from invading countries.